The chairman of the Senate Intelligence Committee said Wednesday that Russia's activities on social media were "indiscriminate" and did not favor either side of the political spectrum.
"Questions that you might have surrounding Comey's firing are better answered by the general counsel or by the Justice Department, not the Select Committee of Intelligence in the United States Senate", Burr continued.
Burr said that the "subject matter of the ads seemed to be to create chaos in every group they could possibly find in America", noting that the ads show that the Russians "were indiscriminate" in who they were helping.
The leaders of the Senate Intelligence Committee announced Wednesday they will no longer pursue details surrounding the memos former FBI Director James Comey wrote as personal recollections of his conversations with President Trump about the Russian Federation investigation.
"We hope we will very soon reach some definite conclusion", Burr said, without setting a target deadline.
Burr said the Russians had been "pretty darn successful" in fomenting chaos in the US political system.
Burr said he had a message for witnesses who are reluctant to speak to the committee: "If you don't voluntarily do it, I can assure you today, you will be compelled to do it".
Alongside several other congressional committees, it is also looking into any connections between Russian meddling and Mr Trump's campaign.
The dossier, authored by former British spy Christopher Steele, includes unverified allegations about Trump's connections with Russian Federation and surfaced online in January.
Burr said that both he and Warner made personal efforts to reach Steele, but he had not accepted their invitations.
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The dossier accuses the Trump campaign of conspiring with Russia, and it asserts that Russian intelligence agencies have information about Trump's participation in sexual escapades in Moscow, something Trump has denied. They've also interviewed Jared Kushner, Trump's son-in-law and confidant. "The committee can not really decide the credibility of the dossier without understanding things like who paid for it, who are your sources and sub-sources".
Republican Sen. Richard Burr of North Carolina and Democratic Sen.
Burr said his committee's investigation is rapidly moving forward and has carried out more than 100 interviews and has canvassed almost 100,00 pages of documents, many of them highly classified.
"The overall theme of the Russian involvement in the US elections was to create chaos at every level", he said.
The social media companies have recently met with the committee and turned over information about ad purchases made by Russia-linked operatives, including RT and Sputnik, two news outlets controlled by the Kremlin.
During a Wednesday press conference, Senate Intelligence Committee Chairman Sen.
"The Russian intelligence service is determined, clever and I recommend every campaign and every elected official take this seriously", Burr said. Mark Warner, have lately focused on the overt use of these networks by Russian influence operators.
This story has been edited and will continue to update with additional developments.